<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>体验vw和vh</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        /* 1. vw = 1/100视口宽度 */
        /* .box {
            width: 50vw;
            height: 30vw;
            background-color: pink;
        } */

        /* 2. vh = 1/100视口高度 */
        .box {
            width: 50vh;
            height: 30vh;
            background-color: pink;
        }
    </style>
</head>
<body>
    <div class="box"></div>
</body>
</html>